to burst into laughter; to laugh uncontrollably
estallar en risa; reírse incontrolablemente (para estayar en risa; reirse incontrolablemente)
"We all cracked up at his silly joke."
"Todos nos reímos a carcajadas de su chiste tonto." (Nosotros todos **nos reimos a carcajadas** de su chiste tonto.)
to switch operations gradually to another system
to remain as a feeling of worry, sadness, or fear
to express all your feelings freely
to remind someone of something from the past
to make progress toward achieving a goal
to direct your eyes downward; to check notes